Warp-stop-motion apparatus.



No. 643,95I. Patented Feb. 20, |900. G. 0. DRAPEB.

wAnP sToP MoTmN APPARATUS.

(Applicatioh filed Ag. '7, 1899.)

um Model.)

lllllll I Hllllllll Nw QW@ UNITED STATES PATENT OFFICE.

GEORGE O. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPERCOMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-M OTION APPARATUS.

SPECIFICATION forming part of Letters Patent No. 643,951, dated February20, 1900.

Application filed August 7,1899. Serial No. 726,368. (No model.)

To all whom it may concern,.-

Be it known that I, GEORGE O. DRAPER, of Hopedale, county of Worcester,State of Massachusetts, have invented an Improvement in Warp-Stop-MotionApparatus, of which the following description, in connection with theaccompanying drawings, is a specification., like letters on the drawingsrepresenting like parts.

My invention relates to warp-stop-motion apparatus wherein the movementof a detector into abnormal position when released by its warp-threadwill through engagement with a feeler effect the operation of suitablestopping means, whereby the apparatus will be stopped automatically uponbreakage or undue slackness of a warp-thread.

By the novel construction to be hereinafter described, and particularlypointed out in the claims, a detector when released moves to bring itsWarp-engaging portion into position to visually indicate to the Weaver afaulty warp-thread and its location, such portion of the detector beingat such time readily accessible for rethreading.

I have herein illustrated my invention as applied to a loom, such beingprobably its most general application; but my invention is notrestricted to such use.

Figure 1 is a longitudinal sectional view of a portion of a loom withone embodiment of my invention applied thereto, taken on the line acFig. 2. Fig. 2 is a partial rear elevation of the apparatus shown inFig. 1, and Fig. 3 is a detail ot part of the mechanism shown in Fig. 1,with a detector in abnormal position assumed when released byitsWarpthread.

Of the loom mechanism shown the frame A, harnesses H, shipper-handle S,whip roll or bar W, and the lease-rods L L may be and are of well-knownor usual construction, the loom sides having mounted thereupon suitablebrackets M to support a fixed rod or bar m, extended across the loombetween the lease-rods and whip-roll, and mounted upon said rod I haveherein shown a series of stoprnotion controlling or actuating detectorscl, loosely mounted to rock or move angularly upon the said rod orsupport.

I prefer to make the detectors of thin sheet be below the support.

metal and' considerably longer than' wide, each detector having near oneend, as herein represented, an aperture dx, forming a Warpeye. Thesupport or rod m is extended through an aperture in each detectorlocated eccentric to its center of gravity and nearer the eye dx, sothat the longer portion d will When a detector is free to moveangularly, it will be swung by gravity into upright position. (Seedotted lines, Fig. 1, and full lines, Fig. 3.) Normal warp-threads-thatis, threads intact and under proper tensionwill control and maintaintheir detectors in an inclined position, (see full lines, Fig. 1,) withtheir eye ends inclined in the directionof travel of the threads,thedetectors being substantially concealed by the threads, the latterpassing over a warprest (shown as a bar 25) mounted in the brackets Mlsomewhatabove the support m and between the latter and the harnesses,as

clearly shown in Fig. 1. When, however, a detector is released byslackness or failure of its warp-threads, it turns or moves angularly byor through the action of gravity into substantially upright position,(see Fig. 3,) with its lower heavy portion d in the path of the feelerand between the latter and a back-stop (shown as a bar t) mounted on thebrackets. The entire framework of the supporting structure consists ofside supports and rods, preferably of round cross-section to obviate theusual tendency to the collection of lint and dirt. The upright rear edgeof the detector then engages and arrests the feeler a at its next inwardswing at a point substantially opposite the back-stop, the latterpreventing any movement of the detector when so engaged by the feeler,the latter being shown as an angle-iron attached to arms a', fast on arock-shaft a.

When a detector is released, its Warp-engaging end swings up intoposition above the plane of the warp-threads, as shown in dotted lines,Fig. 1, and in full lines, Fig. 3, to thereby indicate at once to theweaver a 'faulty thread and the location of the same.

At the same time the warp-eye is brought up into easily-accessibleposition, so that the weaver can readily insert the broken warpthreadand piece it up. The engaging edge IOO of the feeler is notched toprevent twisting or lateral movement of an engaged detector. The normalvibration of the feeler may be effected by any suitable mechanism and tooperate the stopping means for the apparatus upon arrest of the feelerby a detector, and I haveherein shown one convenient form, substantiallysuch as shown and described in United States Patent No. 622,l82,datedMarch 29, 1899, and which will be described briefly.

An arm a2 on the rock-shaft a and extended oppositely to the feeler hasa pivotally-connected bent arm a3, provided with a bunter Cv and a toea4, cooperating with an edge cam D, preferably 011 the cam-shaft C, saidbunter a5 being thus moved into and out of the path of one or moretappetsf of a cam F, fast on the shaft C. lVhen the feeler is arrested,the bunter a5 is held up in the path of the tappets, engagementtherewith swinging the arm a3 to the rear. Said arm is slotted at a6 toreceive a stud d6 on a short lever d10, pivoted at its upper end at (Z7to a link d8, hooked around the cam-shaft at dfand jointed at its otherend to an arm e of a rock-shaft eX, provided with a knock-off arm e forthe shipper-lever. The lower end of the lever (ZIO and the arm e areconnected by a rod e2, the joint e3 acting as the lever-fulcrum when thebunter a5 is acted upon by the tappet-cam F, the swing of the upper endof said lever moving the link d8 longitudinally to operate the knock-olfarm and release the shipperhandle S. The feeler is swung toward thedetectors by the weight of the arm a3 and its connected parts, thereverse or outward swing of the feeler being effected by the cam D.

I have shown herein an operative mechanism embodying one form of myinvention without attempting to show the various forms or arrangementsin which my invention may be embodied.

Having fully described my invention, what I claim, and desire to secureby Letters Iatent, is-

1. In an apparatus of the class described, a series of angnlarly-movabledetectors having parallel side edges, and fulcrumed eccentric to theircenters of gravity and below the warps, each detector having a warp-eyein its lighter portion, normal warp-threads maintaining the eye ends ofthe detectors depressed, a released detector moving by gravity intoupright position with its eye end elevated above the warp-threads, afeeler to engage the depending portion of a released detector, stoppingmeans operative by or through engagement of the feeler with a releaseddetector, and a back-stop for a detector engaged by the feeler, thefeeler and back-stop engaging opposite side edges of the detector, andbeing located below the fulcra ofthe detectors.

2. In a warp stop-motion, stopping means, and a frame to support aseries of detectors and a feeler, and also to provide a warp-rest andback-stop, said frame consisting of stationary side supports and aseries ot' cylindrical parallel rods iixedly attached to said supports,substantially as shown, said rods forming the only horizontalconnections between the side supports and thus making a light, cleanstructure for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE O. DRAIER.

Iitnessesz SIMON W. HATHEWAY, JOHN C. EDWARDS.

